How severe is CVE-2025-40723?

CVE-2025-40723 has a CVSS 4.0 base score of 5.1, rated medium severity.

Is CVE-2025-40723 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-40723?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-40723 have an EU (EUVD) identifier?

Yes. CVE-2025-40723 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19865.

When was CVE-2025-40723 published?

CVE-2025-40723 was published on 2025-07-03 and last updated on 2026-06-17.

CVE-2025-40723

CVE-2025-40723 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 4.0 base score 5.1)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19865
Weakness: CWE-79
Published: 2025-07-03
Last modified: 2026-06-17

Description

Stored Cross-Site Scripting (XSS) vulnerability in versions prior to Flatboard 3.2.2 of Flatboard Pro, consisting of a stored XSS due to lack of proper validation of user input, through the footer_text and announcement parameters in config.php.

Frequently asked questions

What is CVE-2025-40723?: Stored Cross-Site Scripting (XSS) vulnerability in versions prior to Flatboard 3.2.2 of Flatboard Pro, consisting of a stored XSS due to lack of proper validation of user input, through the footer_text and announcement parameters in config.php.
How severe is CVE-2025-40723?: CVE-2025-40723 has a CVSS 4.0 base score of 5.1, rated medium severity.
Is CVE-2025-40723 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-40723?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40723 have an EU (EUVD) identifier?: Yes. CVE-2025-40723 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19865.
When was CVE-2025-40723 published?: CVE-2025-40723 was published on 2025-07-03 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-stored-cross-site-scripting-xss-vulnerabilities-flatboard-pro

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